Silencer.



J. A. MAYER.

SILENCER.

APPLICATION EILEDIUNE24.19I5.

- Patented May 9,1916.

I N I INVENTOR JOHN A. MAYER, OF TOLEDO, GII-H0.

SILENCER.

Specication of Letters Patent.

Patented May 9, v19.16@

Application :filed .Tune 24, 1915. Serial No. 36,103;

To all whom t may concern:

Be it known that I, JOHN A.. MAYER, a citizen ofthe United States, and a resident of Toledo, in the county of Lucas and State of Ohio, `have invented a certainnew and useful Silencer; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings,

and to the characters of reference marked ereon, which form a part of this specification.

' My invention relates to silencers, and it has for its object to prevent the explosive detonating pulsating sound which occurs in the operation of an'unmuled internal combustion engine.

The object of the invention is to produce a substantially constant outflow of the exhaust gases giving opportunity for a certain amount of expansion and at the same time to prevent the loud pulsating sound which occurs in the operation. of an internal combustion engine, and yet avoid all b'ack pressure on the engine, producing a substantially constant outflow of exhaust gases.

The invention also has for its lobject to produce anv eiicient silencer which may be used in connection with automobiles found generally in use and which may be easily made.

The invention may be contained in many forms of construction usable for different purposes all of which come within the purview of my claims hereinafter appended. To show the practicability of my invention Ihave selected one of 'such construction as an example and shall describe it hereinafter. The construction selected for purpose of illustration is illustrated in the drawings whereinI Figure 1 is a vertical sectional View through the muiiier, a part thereof/being shown in perspective. Fig. 2 is a sectional view through a drum located at the end of the silencerlooking in the direction of the arrows 2, 2. Fig. 3 is also a section ofthe drum looking in the direction of the arrows 3, 3. Fig. 4 is' an end view of the silencer disconnected from the exhaust manifold of the engine.

1, Fig. 1, is a pipe which is connected to the exhaust 2 which leadsfrom the exhaust manifold of anautomobile engine. Thisis of the pipe.

'slightly curved so as to usually located-beneath the automobile car and conducts the exhaust gases tothe rear end of the automobile. lt may be provided with a flanged collar 3 to-which it is threaded. By means of the flanged collar 3 and bolts et connection is made with the'exhaust Y 2. A strip of sheet metal 10 is placed within the' pipe 1.` The s'tripof metal is provided with a plurality of semi-circular or semielliptically cut tongues 11, which are located in spaced relation with respect to each other and are alternately bentto opposite sides of the strips 10. rlhe edges of the tongues 11, as shown in Fig. 3, whether semicircular or semielliptical, fit the wall of the inclosing pipe, particularly lat the exhaust end of the pipe. rllhe openings 12 formed by bend# ing the tongues from the strip. are semi-circular or semi-elliptical, according to the shape of the tongues. Exhaust gases pass through the openings 12, as they are directed back and forth through the strip by the tongue 11 into the short semi-cylindrical chambers which are dened by the .wall of the pipe and the tongues, which more or less lit the wall of the pipe. The semi-circular or semielliptical tongues are preferably bent away from the inlet end of the pipe, the openings thus being formed in the strip at the ends of the short semi-cylindrical chambers toward the exhaust end of thepipe. The tongues 11.may be slightly curved, as is best shown in the top view of the tongue 11 located at the right end of Fig. 1, to gradually change the direction of the gases to theopen- |The strip 10 is also body of the strip 10. lf the tongues are cut along the line of a semi-circle, they may be bent substantially 90 .to opposite sides of the strip, so that their edges will lit the wall lf they are cut along the line of a semi-ellipse of considerable length relativev to the height, the tongues may be bent so as to be located at an angle less than 90, according to their length, to close as much as may be desired the portion of the bore or passage-way of the pipe located on the sides of the strip 10. They may also be gradually change the dir ection of .movement of the gases to the pipe, that is, to the corners formed by the flanges 15 and the side of thestrip and through the openings in succession. The

number et' tongues formed inA thestrip vary according to the length and the sizeof the ipe. e v

The strip 10 may be securedif desired, in any convenient -way Withinthep'ipe, l. rdi narily the titting of the strip l0 will be sutijicient to hold the strip within'th'epipe l, The strip 10 may be bent spirally so that one end of the strip will be located at right ,i s to the plane otlthe other end of the This operates the' same as givingad itional'length to the pipe and str-ij providing additional openings and to g J' hen the exhaust takes place 'the gases y be deflected back and forth to opposite des of the strip 1G- Within the pipel until inally passes out through the end of the pipe l. At' the inletend of the pipe, a part or all the` gases will enter the first short chamber on one side of the strip, depending on how closely. the tongue on the 'opposite its the pipe. It it does not lit the pipe, some will also enter the yfirst chamber on the opposite side of the strip. Exhaust gases Will then be directed back and forth in the pipe. As the pulsations decrease in their intensity, the gases flow in the sinuous path provided for by the tongues and openings. The end of the pipe l may also be provided with a lens-shaped drum 2O which -may be secured to thel end of the pipe by means of acollar 21 which may be, if desired, spot Welded to the pipe l, or may be threaded onto the pipe. l, however, have shown in the drawing a bracket 22 which operates to hold the rear end of the pipe 1 and also the drum 20 in position. The bracket 22 is suitably riveted or spot welded to the side of the drum, yas indicated, and may be fastened to the frame of the car as may be desired. The collar 21 fits over thev end of the pipe l.

The lower edge of the lens-shaped drum 20 may be provided with an elliptical opening 25. A. short delivery pipe 26 is preferably secured to the drum 20 so as to receive the exhaust gases from the drum 2O and directthem diagonally downward to the rear ofthe cai'. rEhe lower end of the pipe 26 terminates in a circular port or opening Q7 through which the exhaust gases are finally delivered.

The construction selected and described may be greatly varied in the arrangement yand manufacture of its parts and in the substitution of elements' having equivalent functions, and such modifications may be used for many varied purposes and still contain the invention.' l

Having thus described my invention, what I claim as new, and desire toisecure by Letters Patent, is,- I

1. An engine silencer comprising a pipe connected with the exhaust of an internal combustion engine and having a strip, the

' sides thereof and so port, a short pipe forming a plurality g aref strip having tongues bent alternately to opposite sides [of the strip and located the lengthofv the pipepthe strip bent spirally lengthwise.v f

2;v A'n'engine silencer comprising a pipe connected with` the exhaust Iof an internal engine and'having a strip, thestrip having tongues bent alterna-telyto opposite sides of the strip and lccatedthe length of the pipe, the stripy bent spirally lengthwise substantially 90,0 from `one end of the strip to the cured to the end of the pipe and having an exhaust port.

4s An engine silencer comprising a pipe,

a strip having'semi-elliptical tongues cut therefrom and bent alternately to opposite as to fit the Walls of the pipe, a lens shaped drum secured to the end of the pipe and having an elliptical exhaust terminating in a circular opening covering the said elliptical opening of the said drum. 4-

5. An engine silencer comprising a pipe connected with the exhaust of an internal combustion engine, and having a strip ex-` tending lengthwise of and diametrically across the pipe, and dividing the pipe into semi-cylindrical chambers, the strip having tongues bent alternately to opposite sides of the strip, and having passage-ways for exhaust gases back and forth through the strip. 6. An engine silencer, comprising a pipe, a strip having tongues cut therefrom and bent alternately to opposite sides thereof to baiie exhaust gases as they pass through the pipe, and to direct them through the openings ormed by cutting and bending the tongues from the strip.

7. An engine silencer, comprising a pipe connected with the exhaust of .an internal combustion engine, and having a strip dividing the pipe into two semi-cylindrical chamberstongiies extending. angularly from the pipe and 4dividing the semi-cylindrical chambers into a plurality of shorter chambers, the strip having openings to allow exhaust gases to pass alternately this-ugh the short chambers on opposite sides of the strip.

8. in engine silencer, comprising a pipe' connected to the exhaust of internal com.- bustion engine, the pipe having a central wall and a plurality of transverse walls,

tending along the central Wall, the central Walls having openings forming communieating passageways sinuous communicating passage-way through of short chambers ex tc the shorter chambers izo 'the pipe back and `forth along opposite sides 180 other.

the tongues from the strip being located at the side of the tongues toward the inlet end of the pipe for permitting exhaust gases to pass .alongthe short chambers t0 the tongues and be directed to opposite sides of the strip from the inlet end to the outlet end of the ipe.

p In testimony whereof, Il have hereunto signed my name to this specification.

J OHN A. MAYER. 

